Question

Q.4 of 37
Why is electronic energy negative?
(1 marks)
Answer:​

Answer 1

It is because when an electron is at infinite distance from nucleus,then there the kinetic energy of that electron cannot be calculated. ... That's why the electrons energy is taken as negative. The -ve sign of energy means that the energy of the electron in the atom is lower than the energy at rest of a free electron

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Answer 2

I didn't understand ok ok ok